Trolley.



( PATENTED 1330.3 G. BHMANN.

TROLLEY. APPLICATION FILED JUNE 19. 190B.

Inventor Caszaa 13 Y "-eUsraYJEnMANN,

OF CANTON, OHIO.

- rRoLLEY.

no. erases.

Specification of Letters Patent.

Patented Dec. 3, 1907.

- 'Ap'plioetion filed June 19. 1906. Serial No. 322.480.

To all whom it may concern:

Be it known that I, GUs'rAv EHMANN, a

citizen of the United States, residing at Canto'n,i n the county of Stark and State of Ohio, have invented certain new and useful Im rovements in Trolleys; andI do hereby dec are that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, making a part of this specification, and to the numerals and figures of reference marked thereon, in

.lisure l is a vertical section of the harp aid trolley wheel, and a longitudinal section '01 the spring barrel showing the harp'stem located therein, also showing the anti-friction rings in section; Fig. 2 is an edge view of the trolley wheeland ha showing the harp stem in its barrel and t 1e spring compressed. Fig. 3 is a side elevation of the trolley head proper, showing arts in section. Fig. 4 is a view showing the ottom or lower end of the harp stem showing parts in see tion. Fig. 5 is a view' showing the bottom or lower end of the harp stem-barrel and a portion of the trolley poleconnecting arm. Fig. 6 is a view showlng the top or u per portion of a car in dottedlines, and 1 lustrating the position of the trolley wheel and pole with reference to a curved trolley wire.

' The present inventionhas relation to trol- 5' leys, and it consists in the different parts and combination of parts andthe novel construction hereinafter described and particularly pointed out in the claims. p

' Similar nflmerals of reference indicate corresponding parts in all the figures of the drawing.

In the accompanying drawing, 1 repree sents the harp, which may be of the form shown and to which is attached the axle 2, u on which axle is mounted the trolley w col 3 in the usual manner. The harp 1 is provided with the integral stem 4, which stem is located and held in the barrel 5, which barrel is provided with thelateral or angled arm 6, to which arm is attachedthe top or upper end of the trolley pole 7, which trolley polemay be of any desired construction. The trolley pole within itself forms no articular part'of the present invention; but

it will be understood that a trolley pole of so1ne.k ind.must necessarily be un'einafter described. The bottom or lower end of the lpresent to harp 1 is provided with the shoulder 8, against which shoulder is located the top or upper face of the upper ring9. Below the ring 9 is located the ring 10, said rings being provided with semi-circular grooves 11 in which rooves are placed the ball bearings 12, which all bearings are for the purpose of-reducing the friction between the rings 9 and 10. Below the ring 10 and in contact therewith is located the spring 13, which spring is located in the top or upper end of the barrel I 5, the bottom orlower end of said 5 ring restingupon the shoulder 14, by whic ar- I rangement the spring 13 is confined between the lower ring 10 and the shoulder 14, and by such confinement the spring will have atendency at all times to move the rings '10 and the harp 1 to ether with the harp stem 4 u ward, and hol said parts in the position il ustrated in Fig. 1

When the trollev wheel 3 is brought into proper contact with the trolley wire 15, the

upward pressure of the trolley pole will force the trolley wheel 3 into proper contact with the trolley wire in the usual manner; and by said pressure the spring 13 will be .compressed as shown in'Fig. 2, m ving the harp stem 4 and the rings 9 and 1 downward or toward the top or upper end of the barrel 5,

until the ring 10 comes in contact with the to or upper-end of said barrel."

t" is nzell understood that it is necessary at all times to have the axle of the trolley wheel at right angles to the trolley wire at the time the trolley wheel 3 is to be connected or attached to the trolley wire and in order to accomplish this result the bottom or lower end of the harp-stem 4 is provided with the cross pin 16, upon which cross pin are .mounted the anti-friction rollers 17, saidparts being located and arranged, as best illustrated in-Fig. 4. The bottom or lower end of the barrel 4 is substantially of the form shown in Fig. 5, and as shown it is rovided with the arallel extensions 18 between which para lel extensions are 10- cated the out out portions or the openings 19, the wall of the openings and the extensions. constituting a cam tread for the anti-frictionrollers 17. I

It will be understood that when the trolley wheel 3 is removed or accidentally detached from the trolle Wire the spring 13 will come into action ant move the harp stem u ward, thereby bringing the anti-friction rol ers 17 into contact with the wall or cam at the bottom or lower end of the barrel 5 and by reason of the formation of the lower end of the barrel the harp stem will be rotated axially until the anti-friction rollers 1?. brought into engagement with. the extreme upper portions or tops of the opening 12'), thereby bringing the axle of the trolley wheel at right angles to the trolley wire, thereby automatically adjusting the trolley wheel for position to be connected to the trolley wire, When the trolley wheel is in contac' with the trolley wire the harp 1 and its stem 4 will be moved downward with reference to the barrel 5, which brings the anti-lriction rollers 17 mounted upon the cross pin 16 out of contact with the bottom or lower end of the barrel 5 at which time the harp stem l is free to rotate axially thereby allowing the trolley wheel 3 to adjust itself or follow the trolley wire regardless of the degree of curve. ture of the trolley wire.

For the purpose of protecting the spring 13 at all tunes and also the joint between the rings 9 and 10 the band or covering 20 is provided, which is securely attached to the lower ring 10 by means of screws :21 or their equivalents. The band 20 he ;g so formed that it is free to more up and down upon the barrel 5.

friction bearings 17, the housing 22 vided, which is connected to the arm 6 it equivalent or it may be connected to t e v or upper end 01" the pole, but I prefer to conhect the housing 22 direct to the arm tso a; to provide a complete structure within itself,

. can be attached to trolley poles witherence to any specific construction. will be understood that by providing the spring 13 that a longitudinal movement of the s un can be imparted and is imparted to the stem thereby providing a yieldingcontact as betwer n the trolley wheel and trolley wire independent of the trolley pole.

Fer the purpose of holding the anti-friction rollers in position the screws 23 are provided, which are connected to the cross pin in the usu l mannlux I fully described my invention whatclaim as new and desire to secure by Letters Patent is r in a trolley of the class described, the combination of harp and wheel, a stem provided with means at its bottom orlower end to lim t its upward movement, a barrel provided with a cam wall, a housing adapted to inelose the bottom or lower end of the barre and harp stem, rings interposed ber the barrel and harp and a spring 10- r within the barrel and below the lowerand a ring secured to one of the l rings and adapted to inclose the ext nded ever the joint between rings, substantially as and m,rpcse specified. l imony that I claim the above, I have hereunto subscribed my name in the presence or" two witnesses.

G STl-XV EHMANN itnesses:

.ltrlr EHA'ZANN.

W, Bonn. 

